This is a wall-mounted power supply with a 9VAC output and a 7.5 VA current capacity. It is compatible with the following Alesis products: SR-16, HR-16 and 16B, D4, DM5, Midiverb II, III and 4, Microverb 2, 3 and 4, 3630 Compressor, Nanobass, Nanocompressor, Nanopiano, Nanosynth, and Nanoverb.